<template>
	<el-row class="login-container">
		<el-col :lg="16" :md="12" class="left">
			<div>
				<div>欢迎光临</div>
			</div>
		</el-col>
		<el-col :lg="8" :md="12" class="right">
			<h2 class="title">登录</h2>
			<div>
				<span class="line"></span>
				<span>账号密码登录</span>
				<span class="line"></span>
			</div>
			<el-form ref="formRef" :rules="rules" :model="form" class="w-[250px]">
				<el-form-item prop="username">
					<el-input v-model="form.username" placeholder="请输入用户名" />
					<template #prefix>
						<el-icon>
							<user />
						</el-icon>
					</template>
				</el-form-item>
				<el-form-item prop="password">
					<el-input type="password" v-model="form.password" placeholder="请输入密码" show-password />
					<template #prefix>
						<el-icon>
							<lock />
						</el-icon>
					</template>
				</el-form-item>
				<el-form-item>
					<el-button round color="#626aef" class="w-[250px]" type="primary" @click="onSubmit"
						:loading="loading">登录</el-button>
				</el-form-item>
			</el-form>
		</el-col>
	</el-row>
</template>

<script setup>
	import {
		ref,
		reactive,
		onMounted,
		onBeforeUnmount
	} from "vue";

	import {
		toast
	} from "../composables/util";
	import {
		useRouter
	} from "vue-router";
	import {
		useStore
	} from 'vuex';

	const router = useRouter()
	const store = useStore()

	const form = reactive({
		username: "",
		password: ""
	})

	const rules = {
		username: [{
				required: true,
				message: '用户名不能为空',
				trigger: 'blur'
			},
			{
				min: 3,
				max: 5,
				message: '用户名长度必须是3-5个字符',
				trigger: 'blur'
			}
		],
		password: [{
			required: true,
			message: '密码不能为空',
			trigger: 'blur'
		}]
	}

	const formRef = ref(null)
	const loading = ref(false)

	const onSubmit = () => {
		formRef.value.validate((valid) => {
			if (!valid) {
				return false
			}
			loading.value = true

			store.dispatch("login", form).then(res => {
				toast("登录成功")
				router.push("/")
			}).finally(() => {
				loading.value = false
			})
		})
	}

	function onKeyUp(e) {
		if (e.key == "Enter") onSubmit()
	}

	onMounted(() => {
		document.addEventListener("keyup", onKeyUp)
	})

	onBeforeUnmount(() => {
		document.removeEventListener("keyup", onKeyUp)
	})
</script>

<style scoped>
	.login-container {
		@apply min-h-screen bg-indigo-500;
	}

	.login-container .left,
	.login-container .right {
		@apply flex items-center justify-center;
	}

	.login-container .right {
		@apply bg-light-50 flex-col;
	}

	.left>div>div:first-child {
		@apply font-bold text-5xl text-light-50 mb-4;
	}

	.right .title {
		@apply font-bold text-3xl text-gray-800;
	}

	.right>div {
		@apply flex items-center justify-center my-5 text-gray-300 space-x-2;
	}

	.right .line {
		@apply h-[1px] w-16 bg-gray-200;
	}
</style>